Issue #48:
 - Normalize block class
 - Don't display empty content tag
Issue #48: Remove old block_simple template
Issue #48: Refactor page children block
Issue #48: Add title level configuration on simple block
Issue #48: Translation
Move title level in baseblock
Add block title on container, page children and sitemap block
Translation
Issue #48: Don't display empty sitemap title if empty
Merge pull request #49 from halundra/blockRefactoring

Block refactoring